Explanation

In the resistor color code, orange represents the digit 3.

This value is used in the first two bands (significant figures) or as the multiplier depending on the band position.

Explanation

The power (P) is given by:

P = VI

Given P = 100 W and V = 200 V, we can find the current (I):

100 = 200 × I

I = 100 / 200

= 0.5 A

Explanation

Electric current is defined as the rate of flow of charge through a conductor.

Its formula is 𝐼 = 𝑄/𝑡, where 𝐼 is current, 𝑄 is charge, and 𝑡 is time.

Explanation

The total resistance (R) in the series circuit is:

R = 5 + 10 + 10

= 25 Ω

The current (I) is given by Ohm's law:

I = V/R

= 50V / 25Ω

= 2A

Explanation

A typical diffraction grating can have 400 to 50,000 lines per centimeter, depending on precision and application.

Higher line densities provide better spectral resolution for analyzing light.

Explanation

The fine ruling (track spacing) on a CD is about 0.5 micrometers (µm).

This microscopic spacing allows the CD to store large amounts of data through optical encoding.

Explanation

Sound waves are mechanical vibrations that can disturb air particles around a candle flame.

This disturbance causes the flame to flicker due to pressure variations in the air.

Explanation

Explanation

Apparent weight = Normal force, and when moving upward with acceleration g, total acceleration = g + g = 2g.

So, Apparent weight = m × (g + g) = 2mg.

Explanation

When moving with constant velocity, there is no net acceleration acting on the body.

Therefore, the apparent weight remains the same as actual weight — not changed.